Quantitative phase-field modeling of solidification in binary alloys with nonlinear phase coexistence curves

A formalism is presented for performing quantitative phase-field simulations of single-phase solidification in binary alloys with nonlinear solidus and liquidus curves. It is shown that, close to equilibrium, Gibbs free energy of an alloy phase can be approximated by the free energy function of a dilute ideal binary alloy, modified by effective temperature-dependent coefficients. This makes it possible to exploit a recent phase-field technique …